/*
  * Copyright 2010-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License").
  * You may not use this file except in compliance with the License.
  * A copy of the License is located at
  *
  *  http://aws.amazon.com/apache2.0
  *
  * or in the "license" file accompanying this file. This file is distributed
  * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
  * express or implied. See the License for the specific language governing
  * permissions and limitations under the License.
  */

#pragma once

#include <aws/core/Core_EXPORTS.h>
#include <aws/core/http/HttpRequest.h>
#include <aws/core/http/HttpTypes.h>
#include <aws/core/utils/memory/AWSMemory.h>
#include <aws/core/utils/memory/stl/AWSStreamFwd.h>

namespace Aws
{
    namespace Utils
    {
        namespace Stream
        {
            class ResponseStream;
        }
    }
    namespace Http
    {
        /**
         * Enum of Http response Codes. The integer values of the response codes correspond to the values in the RFC.
         */
        enum class HttpResponseCode
        {
            REQUEST_NOT_MADE = -1,
            CONTINUE = 100,
            SWITCHING_PROTOCOLS = 101,
            PROCESSING = 102,
            OK = 200,
            CREATED = 201,
            ACCEPTED = 202,
            NON_AUTHORITATIVE_INFORMATION = 203,
            NO_CONTENT = 204,
            RESET_CONTENT = 205,
            PARTIAL_CONTENT = 206,
            MULTI_STATUS = 207,
            ALREADY_REPORTED = 208,
            IM_USED = 226,
            MULTIPLE_CHOICES = 300,
            MOVED_PERMANENTLY = 301,
            FOUND = 302,
            SEE_OTHER = 303,
            NOT_MODIFIED = 304,
            USE_PROXY = 305,
            SWITCH_PROXY = 306,
            TEMPORARY_REDIRECT = 307,
            PERMANENT_REDIRECT = 308,
            BAD_REQUEST = 400,
            UNAUTHORIZED = 401,
            PAYMENT_REQUIRED = 402,
            FORBIDDEN = 403,
            NOT_FOUND = 404,
            METHOD_NOT_ALLOWED = 405,
            NOT_ACCEPTABLE = 406,
            PROXY_AUTHENTICATION_REQUIRED = 407,
            REQUEST_TIMEOUT = 408,
            CONFLICT = 409,
            GONE = 410,
            LENGTH_REQUIRED = 411,
            PRECONDITION_FAILED = 412,
            REQUEST_ENTITY_TOO_LARGE = 413,
            REQUEST_URI_TOO_LONG = 414,
            UNSUPPORTED_MEDIA_TYPE = 415,
            REQUESTED_RANGE_NOT_SATISFIABLE = 416,
            EXPECTATION_FAILED = 417,
            IM_A_TEAPOT = 418,
            AUTHENTICATION_TIMEOUT = 419,
            METHOD_FAILURE = 420,
            UNPROC_ENTITY = 422,
            LOCKED = 423,
            FAILED_DEPENDENCY = 424,
            UPGRADE_REQUIRED = 426,
            PRECONDITION_REQUIRED = 427,
            TOO_MANY_REQUESTS = 429,
            REQUEST_HEADER_FIELDS_TOO_LARGE = 431,
            LOGIN_TIMEOUT = 440,
            NO_RESPONSE = 444,
            RETRY_WITH = 449,
            BLOCKED = 450,
            REDIRECT = 451,
            REQUEST_HEADER_TOO_LARGE = 494,
            CERT_ERROR = 495,
            NO_CERT = 496,
            HTTP_TO_HTTPS = 497,
            CLIENT_CLOSED_TO_REQUEST = 499,
            INTERNAL_SERVER_ERROR = 500,
            NOT_IMPLEMENTED = 501,
            BAD_GATEWAY = 502,
            SERVICE_UNAVAILABLE = 503,
            GATEWAY_TIMEOUT = 504,
            HTTP_VERSION_NOT_SUPPORTED = 505,
            VARIANT_ALSO_NEGOTIATES = 506,
            INSUFFICIENT_STORAGE = 506,
            LOOP_DETECTED = 508,
            BANDWIDTH_LIMIT_EXCEEDED = 509,
            NOT_EXTENDED = 510,
            NETWORK_AUTHENTICATION_REQUIRED = 511,
            NETWORK_READ_TIMEOUT = 598,
            NETWORK_CONNECT_TIMEOUT = 599
        };

        inline bool IsRetryableHttpResponseCode(HttpResponseCode responseCode)
        {
            switch (responseCode)
            {
                case HttpResponseCode::INTERNAL_SERVER_ERROR:
                case HttpResponseCode::SERVICE_UNAVAILABLE:
                case HttpResponseCode::TOO_MANY_REQUESTS:
                case HttpResponseCode::BANDWIDTH_LIMIT_EXCEEDED:
                case HttpResponseCode::REQUEST_TIMEOUT:
                case HttpResponseCode::AUTHENTICATION_TIMEOUT:
                case HttpResponseCode::LOGIN_TIMEOUT:
                case HttpResponseCode::GATEWAY_TIMEOUT:
                case HttpResponseCode::NETWORK_READ_TIMEOUT:
                case HttpResponseCode::NETWORK_CONNECT_TIMEOUT:
                    return true;
                default:
                    return false;
            }
        }

        /**
         * Abstract class for representing an Http Response.
         */
        class AWS_CORE_API HttpResponse
        {
        public:
            /**
             * Initializes an http response with the originalRequest and the response code.
             */
            HttpResponse(const HttpRequest& originatingRequest) :
                m_httpRequest(originatingRequest),
                m_sharedHttpRequest(nullptr),
                m_responseCode(HttpResponseCode::REQUEST_NOT_MADE),
                m_hasClientSigningError(false),
                m_hasNetworkConnectionError(false)
            {}

            /**
             * Initializes an http response with the shared_ptr typed originalRequest and the response code.
             */
            HttpResponse(const std::shared_ptr<const HttpRequest>& originatingRequest) :
                m_httpRequest(*originatingRequest),
                m_sharedHttpRequest(originatingRequest),
                m_responseCode(HttpResponseCode::REQUEST_NOT_MADE),
                m_hasClientSigningError(false),
                m_hasNetworkConnectionError(false)
            {}

            virtual ~HttpResponse() = default;

            /**
             * Get the request that originated this response
             */
            virtual inline const HttpRequest& GetOriginatingRequest() const
            {
                if (m_sharedHttpRequest == nullptr)
                {
                    return m_httpRequest;
                }
                return *m_sharedHttpRequest;
            }

            /**
            * Get the request that originated this response
            */
            virtual inline void SetOriginatingRequest(const std::shared_ptr<const HttpRequest>& httpRequest)
            {
                m_sharedHttpRequest = httpRequest;
            }

            /**
             * Get the headers from this response
             */
            virtual HeaderValueCollection GetHeaders() const = 0;
            /**
             * Returns true if the response contains a header by headerName
             */
            virtual bool HasHeader(const char* headerName) const = 0;
            /**
             * Returns the value for a header at headerName if it exists.
             */
            virtual const Aws::String& GetHeader(const Aws::String& headerName) const = 0;
            /**
             * Gets response code for this http response.
             */
            virtual inline HttpResponseCode GetResponseCode() const { return m_responseCode; }
            /**
             * Sets the response code for this http response.
             */
            virtual inline void SetResponseCode(HttpResponseCode httpResponseCode) { m_responseCode = httpResponseCode; }
            /**
             * Gets the content-type of the response body
             */
            virtual const Aws::String& GetContentType() const { return GetHeader(Http::CONTENT_TYPE_HEADER); }
            /**
             * Gets the response body of the response.
             */
            virtual Aws::IOStream& GetResponseBody() const = 0;
            /**
             * Gives full control of the memory of the ResponseBody over to the caller. At this point, it is the caller's
             * responsibility to clean up this object.
             */
            virtual Utils::Stream::ResponseStream&& SwapResponseStreamOwnership() = 0;
            /**
             * Adds a header to the http response object.
             */
            virtual void AddHeader(const Aws::String&, const Aws::String&) = 0;
            /**
             * Sets the content type header on the http response object.
             */
            virtual void SetContentType(const Aws::String& contentType) { AddHeader("content-type", contentType); }

        private:
            HttpResponse(const HttpResponse&);
            HttpResponse& operator = (const HttpResponse&);

            const HttpRequest& m_httpRequest;
            std::shared_ptr<const HttpRequest> m_sharedHttpRequest;
            HttpResponseCode m_responseCode;
            bool m_hasClientSigningError;
            bool m_hasNetworkConnectionError;
        };


    } // namespace Http
} // namespace Aws


